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In his keynote presentation titled 'Double Dream Hands: So Intense!' at RailsConf 2011, Aaron Patterson shares his insights and experiences as a prominent figure in the Ruby community. He begins by expressing gratitude to notable peers, including John and Jose Valim, before diving into technical discussions related to the latest Rails 3.1 features.

Key points from the talk include:
- **Introduction to Aaron Patterson**: He identifies as an open-source developer at AT&T, illustrating his personal enjoyment of working within a large corporation due to its innovative processes, such as an efficient mail-to-fax system.
- **Rails 3.1 Features**: Patterson presents several significant features added to Rails, focusing on their functionalities and improvements:
  - **New Generators**: He humorously discusses a fictional generator that provides money during financial downturns, emphasizing the creative nature of Rails development.
  - **Prepared Statement Caching**: He details how this feature speeds up database interactions by preparing and caching SQL statements, resulting in a substantial increase in performance metrics, particularly for SQLite and PostgreSQL, while critiquing MySQL's performance.
  - **Serialized Attributes**: Patterson introduces the new ability to save arbitrary Ruby data structures in the database. He explains the transition from a YAML-dependent system to a flexible serialization format allowing various strategies.
  - **Streaming Responses**: This feature allows Rails to start sending data to users before all data is processed, enhancing user experience by utilizing the Rack API.
- **Reflection on Rails Performance**: He critically evaluates Rails' performance over time, noting an increase in average request rates from Rails 2.3 to 3.1, pointing out the implications of background processing on performance due to increased stack depth and garbage collection issues.
- **Community Engagement**: Throughout his presentation, Patterson emphasizes the importance of community involvement in the Ruby ecosystem and the future trajectory of Rails, encouraging new contributors to participate in the framework's evolution.
- **Interactive Dance Segment**: To lighten the mood, he engages the audience in a fun dance routine, creating an atmosphere of camaraderie before wrapping up.

Concluding his talk, Patterson underscores the importance of refactoring code for reusability and efficiency while urging the community to embrace best practices to secure the future of the Ruby programming language. His presentation is not only informative but also entertaining, leaving the audience with an invigorating message about collaboration and innovation in the tech industry.

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